I need help with this please

Which of these innovations led to increased production in american factories in the early 1800s? a. the use of interchangeable parts b. the construction of canals c. the invention of the mechanical reaper d. the availability of electricity

The best example of mobility rights as described in the canadian charter of rights and freedoms is

According to okun's law, if the unemployment rate goes from 2% to 5%, what will be the effect on the gdp?